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Double Bass The Major 7 #9 chord

So I was exploring minor keys/modes today and found that the 6th mode of the harmonic minor yielded an interesting chord which doesn't pop up too much - the major 7#9 chord. Any examples where this chord is used? Charles Mingus used it as a vamp on the tune Celia (or at least one of the recordings - I believe it was substituted for a minor Major7, ie dropping the major 3rd).
 
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A maj7#9 defines the sixth mode of harmonic minor very well. There's almost nothing else you can play that fits the chord.

You might also want to try a #5maj7#9 which defines the sixth mode of harmonic major (lower fifth like major upper fourth like harmonic minor of the first mode of harmonic major).

A VII/I slash chord works for both and let's it open if you want to play hMaj VI or hMin VI (or even hMaj IV or more traditional the diminished scale).
 
If you don't see a note defined in a chord it's better not to play it unless you identified the underlying scale and make sure it is part of it. For us bass players it is best to stick to the root or basic triad notes when we see this unless we improvise on the medium to higher end on our instrument.

If the basic triad is not defined like in a slash chord, better play the root note (bass note) from that chord. That way you don't need to identify weather the bass note is the root of the chord or just a passing note (in which case you shouldn't play triad notes of the bass note).

In your example B/C you or somebody else should play an E (but the lowest note should still be the C, or the character of the chord gets lost) to make clear that it is not something minor or diminished.
 
So like a B/C chord? I see those chords sometimes as endings to tunes. You wouldn't want to emphasis the E too much though would you when you see that?
(In my study and experience) "B/C" means "a Bmaj triad, with a C note in the bass" - it does not mean "a Bmaj triad with a Cmaj triad in the bass". This is a short-hand method of indicating a chord voicing/sound that the composer wants to occur - It is not intended as an analysis of the chord sound. The composer is assuming that the players will have a deeper knowledge and an aural idea of how to play over this sonority.
Below is an example of that sonority - @ 0:21 - 0:26 - in this case it is Eb/E (an Ebmaj triad, with an E note in the bass.)
A "Polychord" is written with a HORIZONTAL line between the chord names (I can't type that format here) if you wanted to specify "a Cmaj triad and a Gbmaj triad to be played simultaneously" (Stravinsky's "Petrushka Chord", for example.)
My $0.03.
Thanks.
 
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(In my study and experience) "B/C" means "a Bmaj triad, with a C note in the bass" - it does not mean "a Bmaj triad with a Cmaj triad in the bass". This is a short-hand method of indicating a chord voicing/sound that the composer wants to occur - It is not intended as an analysis of the chord sound. The composer is assuming that the players will have a deeper knowledge and an aural idea of how to play over this sonority.
Below is an example of that sonority - @ 0:21 - 0:26 - in this case it is Eb/E (an Ebmaj triad, with an E note in the bass.)
A "Polychord" is written with a HORIZONTAL line between the notes ( I can't type that format here) if you wanted to specify "a Cmaj triad and a Gbmaj triad to be played simultaneously" (Stravinsky's "Petrushka Chord", for example.)
My $0.03.
Thanks.

The nomenclature taught to me was: Ab/G = Ab triad over G triad versus Ab/Gbass = Ab triad over a single bass note

This, admittedly, makes for more writing to define the chord, but it does away with the question that may arise, "Is that a horizontal line or an angled line?" (Though it doesn't do away with the question, "This is a wedding gig. What are we doing reading a chart with Beirach-like changes in it?")

You Mileage May Vary, of course.
 
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Joe Hendo uses it @0:15 in Inner Urge (DbMAJ7,#9 ,#11).
I am not able to comment on its Modal Lineage or Pedigree, as that kind of thinking hurts my head and is a PITA, ass well.


Interesting. This tune was struck (stricken? no, wait. crap...) from a setlist 2 weeks ago. A hot shot tenor player from Holland was invited to front our jazz ensemble for a gig. Said Mad Tenorist directed our drummer to announce his desired songs a week in advance. So I accepted the challenge of learning 5 new tunes in about 6 days. Nice new challenge for me.

Thankfully, the trumpet player didn't want to hack this one. Me, I'm still listening...killer drum solo in this tune, by the way. After that solo I wonder who really wanted to play this tune in the set. ;)
 
(In my study and experience) "B/C" means "a Bmaj triad, with a C note in the bass" - it does not mean "a Bmaj triad with a Cmaj triad in the bass".
...
A "Polychord" is written with a HORIZONTAL line between the notes ( I can't type that format here) if you wanted to specify "a Cmaj triad and a Gbmaj triad to be played simultaneously" (Stravinsky's "Petrushka Chord", for example.)
That's what I learned too.

B/C = B major triad above a C bass note

B
-- = B major triad above a C major triad
C

But even if the chord is B/C, the underlying scale might contain an E and if this is the case the bass player can play an E as one of the notes which should include a C too to make clear which chord it is and where the root note of the scale is (much more important with slash chords than with traditional stack of third chords).
 
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That's what I learned too.

B/C = B major triad above a C bass note

B
-- = B major triad above a C major triad
C

But even if the chord is B/C, the underlying scale might contain an E and if this is the case the bass player can play an E as one of the notes which should include a C too to make clear which chord it is and where the root note of the scale is (much more important with slash chords than with traditional stack of third chords).
Here is that very chord (B/C) @ 0:46 - 0:49, sounding very Cdiminished,maj7...(yes, in this context. There could be other, different contexts.)
The Cure -